By the way I just tested it and while you are right about the menu/saving issue there are some SCUMMVM games that can be played fine - e.g. Simon the Sorcerer I & II. Because they have the ability to invoke their in-game menu by USE-ing the postcard. I know it's no Monkey Island but maybe they can tide you over before an official port is available.

Also tried Beneath a Steel Sky and I think there is another problem becuase the RMB is not emulated and the game cannot be controlled. Actually that's just a guess I can't really remember how the game was controlled but this is likely it.

How do you get the games on Lumia930? Starting ScummVM works but searching for a game don't bring me to file tree that could work with the Winphone Library. So what is the destination path to copy the game files?

It allows you to select game folders within the Android-emulated space on your phone (I assume in this sense L920 is no different from L930).
But first of course you have to copy the games there and for that you need to access to the whole filesystem in your phone. This can be done quite easily by creating a link to C: disk first on your computer and transferring it to your phone - it surprisingly works there as well and gives you access everywhere.
This is described in most guides on how to get apktow10M to run.